SAF Blend Cost Calculator

Feedstock and capacity: HEFA pathways compete for waste oils and fats with renewable diesel, newer pathways (alcohol-to-jet, power-to-liquid) carry first-of-kind plant costs, and demand from airline commitments currently outruns supply. Premiums have run 2-4× conventional. The trajectory matters for planning: mandates (EU blending requirements) and incentives (US credits) are scaling supply, but procurement math should use today's quoted premium, not the projected one.

On lifecycle: combustion emits the same ~3.16 kg CO2 per kg as conventional fuel, but the pathway credits carbon absorbed or avoided in production — so a 10% blend of an 80%-reduction SAF cuts the uplift's lifecycle footprint by ~8%. Schemes like CORSIA and corporate accounting accept this with pathway certification (and increasingly book-and-claim, where the physical fuel and the environmental attribute can separate). The percentage input in this calculator is that pathway figure — use the certificate's number.

Current ASTM D7566 pathways cap blends at up to 50% with conventional Jet-A depending on pathway (then the blend is treated as standard D1655 fuel — no aircraft modification needed). Most commercial uplifts run far lower percentages, set by supply and budget rather than limits. 100% SAF flights remain demonstration-territory pending standards work. Practically: your blend input here is a procurement variable, not an airworthiness one, up to the pathway cap.

Clearing site data deletes locally stored entries — that's the price of a genuinely private, server-free design. Protect yourself with the one-click CSV download before any cleanup, OS reinstall or device change: re-importing history later beats reconstructing it from memory.

Always — the CSV export is a complete, lossless dump of your SAF analysis, generated locally in one click. Import it into commercial software, archive it with your files, or post-process it in a spreadsheet. No lock-in is deliberate: data you can't take with you isn't really yours.